Java.sql.SQLRecoverableException: IO Error: Unknown Authentication, Encryption Or Data Integrity When Trying to Establish JDBC Connection (Doc ID 2661210.1)

Last updated on JANUARY 04, 2023

Applies to:

Symptoms

While connecting to an Oracle 11.2.0.4 database with an application using JDK 1.8 and ojdbc8.jar (JDBC drivers 19.3), and with the following configuration in the sqlnet.ora file at the database side:

SQLNET.ENCRYPTION_TYPES_SERVER = (AES256,AES192,AES128)
SQLNET.ENCRYPTION_SERVER = accepted
SQLNET.CRYPTO_CHECKSUM_TYPES_SERVER= (SHA1)
SQLNET.CRYPTO_CHECKSUM_SERVER = accepted

the following error is received:

java.sql.SQLRecoverableException: IO Error: Unknown Authentication, Encryption or Data Integrity algorithm
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:854)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:793)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:57)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:747)

ERROR
----------------
IO Error: Unknown Authentication, Encryption or Data Integrity algorithm

STEPS
------------------

The issue can be reproduced at will with the following steps:
1. Configure database sqlnet.ora with:

SQLNET.ENCRYPTION_TYPES_SERVER = (AES256,AES192,AES128)
SQLNET.ENCRYPTION_SERVER = accepted
SQLNET.CRYPTO_CHECKSUM_TYPES_SERVER= (SHA1)
SQLNET.CRYPTO_CHECKSUM_SERVER = accepted

2. Try to connect from JDBC 19.3.

Changes

Cause

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